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Finding the Fourth Proportional to 119,888.62, 165,443.76 and 65,438.98

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Solution

The fourth proportional to 119,888.62, 165,443.76 and 65,438.98 is: 90,304.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,888.62 : 165,443.76 = 65,438.98 : x
  2. Step 2: Convert to fraction form
    119,888.62/165,443.76 = 65,438.98/x
  3. Step 3: Cross multiply
    119,888.62x = 165,443.76 × 65,438.98
  4. Step 4: Simplify right side
    119,888.62x = 10,826,470,901.76
  5. Step 5: Solve for x
    x = 10,826,470,901.76/119,888.62
  6. Step 6: Final answer
    x = 90,304.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.